贵州省望谟县耕地土壤重金属含量特征及影响因素

Characteristics of Heavy Metal Content in Cultivated Soil of Wangmo County,Guizhou Province and their Influencing Factors

伴随社会经济快速发展,土壤重金属污染越来越成为人们关注的环境问题。为有效预防土壤重金属污染,以贵州省望谟县耕地表层土壤为研究对象,应用经典统计分析、相关性分析等方法,研究重金属元素含量特征及其影响因素。研究结果表明,该地区耕地土壤重金属元素Cd、Cr、Hg、Ni含量较高,均高于全国背景值,其含量主要受成土母质影响,在泥盆系、石炭系、二叠系的碳酸盐岩分布区平均含量较高,在陆源碎屑岩分布区含量普遍较低。该研究结果为该县耕地种植规划和农产品结构调整等提供了依据。

With the rapid development of social economy,soil heavy metal pollution has become an increasingly concerned environmental problem.To prevent soil heavy metal pollution effectively,The surface soil of cultivated land in Wangmo County of Guizhou Province was taken as the research object,The content characteristics of heavy metal elements and their influencing factors were studied by classical statistical analysis and correlation analysis.The results show that,The contents of CD,Cr,Hg and Ni in cultivated soil in this area are higher than the national background values,which are mainly affected by the soil forming parent material.The average contents of CD,Cr,Hg and Ni are higher in the distribution areas of Devonian,Carboniferous and Permian carbonate rocks,and lower in the distribution areas of terrigenous clastic rocks.The research results provide a basis for the county′s cultivated land planting plan and agricultural product structure adjustment.